❌Common Ventilation Installation Mistakes in Ireland
Ventilation is one of the most overlooked aspects of a home’s performance—until problems arise. When discussing common ventilation installation mistakes in Ireland, here are the most prevalent issues we see in Irish homes, and how to avoid them on your MVHR or DCV project.
1. Poor Design Planning
Too many systems are installed with a “just get it in” mindset. Good ventilation starts with proper design:
Accurate airflow calculations
Duct routes planned for minimal pressure loss
Proper unit sizing based on Irish Building Regulations
2. Wrong Ducting Materials
Avoid using cheap flexible ducts with sharp bends
Use semi-rigid or rigid ducts with smooth internal surfaces
Ensure materials meet relevant Irish standards
⚖️ 3. Skipping Commissioning
An uncommissioned system can cause:
Airflow is unbalanced
Noisy rooms or low performance
Home may not meet TGD Part F requirements
4. Poor MVHR Or DCV Placement
Units stuck in tight attic corners with no access
No flooring, making filter changes dangerous
Installed next to bedrooms = noise complaints
Position units where they’re safe to access and easy to service.
5. No Maintenance Plan
Homeowners not told about filter changes
No documentation
MVHR forgotten until it breaks
How to Get It Right
Prioritise ventilation design from the start
Hire certified installers
Use quality equipment and materials
Commission properly and provide documentation
Bonus Tip: Don’t Ignore Insulation and Air-Tightness
Even the best MVHR system can underperform if installed in a poorly insulated or leaky home. Ducts running through cold areas need proper insulation to prevent condensation, and the building envelope must be sealed correctly to support balanced ventilation. A whole-house performance mindset delivers the best long-term results.
Lucas is a certified ventilation contractor based in Ireland, specialising in MVHR and home ventilation systems. With a background in carpentry and home renovations, he ensures every ventilation system is fitted with precision, energy efficiency, and long-term reliability in mind.
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